I have a BMW E30 convertible – in which the bass is clearly missing! But I don’t want doorboards! And a spare wheel woofer doesn’t do anything! Now I’m sure there’s a few smart ones saying: You have a ski bag opening through which you can guide the bass into the interior, or at least a pre-cut sheet metal that I just have to cut out! FALSE!! There’s nothing! The trunk is absolutely DOWN! I can’t cut around on the METall wall either, because it’s a supporting part! is! (You see I’ve been well informed) So who has an idea how to bring bass forward anyway? (Best someone who has tried this successfully – and for pictures I would be a bit more grateful) Thank you SCHLAUBI